84 COCHL1TOMA. 



Length 46, diam. 23, aperture 23 x 12.5 mm. 



Habitat unknown. 



A. zebroides SMITH, Quart. Journ. of Conch, i, p. 347 

 (May, 1878). 



11 This species, of which I have seen only a single specimen, 

 agrees in form very fairly with A. porphyrostoma Shuttle- 

 worth, with the exception of the spire being a little less ob- 

 tuse; and in coloration it reminds one very much of 

 A. zebra. 1 ' (Smith). 



8. C. MACHACHENSIS (E. A. Smith). PL 41, fig. 7. 



Shell long-ovate, moderately thin, white under a thin, 

 glossy yellow cuticle, painted with longitudinal arcuate red- 

 dish-black streaks, sometimes more or less undulating or 

 bifurcating. Spire produced, lightly convex, obtuse at 

 the apex. Whorls 7, a little convex striated with deli- 

 cate oblique growth-lines, separated by a linear, thick- 

 ened white suture; the last whorl noticeably descending in 

 front. Aperture inversely ear-shaped, scarcely half the total 

 length, bluish within and somewhat pearly, showing the 

 blackish streaks through. Columella a little arcuate, whitish 

 in front, obliquely shortly truncate, joined to the lip above 

 by a thin bluish callous (Smith). 



Length 58, diam. 31, aperture 28 x 16 mm. 



Length 52, diam. 27, aperture 25 x 15 mm. 



S. Africa : Basutoland on Mount Machacha, at about 10,000 

 ft. elevation (B. Crawshay). 



A. mackachensis SMITH, Proc. Malac. Soc. London, v, p. 

 169, fig. in text. (July, 1902). 



This is the first species recorded from Basutoland, and al- 

 though exhibiting in some respects a relationship to the well- 

 known A. zebra, it seems on account of its elongate-ovate 

 form to be worthy of specific separation. A. rhabdota of 

 Melvill & Ponsonby is very similar as regards general form 

 and the style of markings, but is described as decussately 

 granulated, a feature entirely absent in the present species, 

 which moreover appears to have more convex whorls, pre- 

 suming that the figure of rhdbdota is accurate, for their form 



